33 JSON Interview Questions (Plus Tips)

By Indeed Editorial Team

Published April 2, 2022

The Indeed Editorial Team comprises a diverse and talented team of writers, researchers and subject matter experts equipped with Indeed's data and insights to deliver useful tips to help guide your career journey.

JSON is a commonly found Java-based computer language that's used across the field of development and programming. Programmers can boost their credibility and marketability by becoming proficient in JSON. With this type of language, you're able to easily store and transport any type of data object using a JavaScript-based solution. In this article, we explore possible JSON interview questions and provide sample questions and answers for your reference prior to your interview.

General questions

General questions are those that introduce the interviewer to the type of candidate you are. These may be more logistically oriented and usually open the interview. You can leverage these types of questions to relay prior experiences . Below are 10 common general questions you may receive in the interview process:

  1. What made you interested in applying for the role?

  2. What made you interested in computer programming?

  3. What's the element that you appreciate the most about JSON?

  4. What's your favorite programming language, and why?

  5. What are the benefits that JSON can offer an organization, in your opinion?

  6. What has your most impactful experience been while learning and using JSON?

  7. What sets your skills apart from other candidates?

  8. Explain what you last used JSON with, and how you used it.

  9. What inspired you to seek new opportunities in the field?

  10. What's the most challenging task you've ever completed using JSON?

Related: The Guide to Passing a Programmer Interview

Questions about experience and background

These questions are considered more in-depth and can help a hiring manager understand the strengths you can bring to the organization. Answering these questions concisely while highlighting as much relevant experience as you can may help you make a strong first impression on your interviewer. Below is a list of 10 interview questions about your experience and background that you can expect in your JSON interview :

  1. What was the most relevant class that you've taken that has helped you to gain skills with JSON?

  2. What's the most complex project that you've completed with JSON?

  3. Have you had any internships or prior experiences using JSON?

  4. In your opinion, is JSON better to use than XML? Why?

  5. In your own words, does JSON have any cons? What are they?

  6. What are the top three ways JSON has assisted you in the past?

  7. What's the most important element of JSON for organizational use?

  8. What's the main purpose of JSON, in your own words?

  9. How many data types exist in JSON programming?

  10. What does a parse function offer in JSON?

Related: 50 Object Oriented Programming Interview Questions

In-depth questions regarding JSON

These questions can assist you in presenting your understanding of the platform positively. While these may take longer to answer, these types of questions can offer an invitation for higher-level conversation and for you to showcase your knowledge in a way that's understandable. This is especially important, as technical knowledge often requires training to understand. If the organization is looking to hire trainers or supervisors, presenting yourself as approachable and easy-to-understand can help you later. Below is a list of 10 possible in-depth questions:

  1. What are some of the most common rules regarding JSON?

  2. What are some features of JSON-RPC?

  3. Differentiate between JSON and JSONNP.

  4. What are key syntax rules for JSON?

  5. How would you decode a JSON string? Explain your methodology.

  6. What are types that are currently natively supported by JSON?

  7. What are the benefits of JSON vs. XML for an organization?

  8. What is the difference between JSON and BSON?

  9. What is BSON, and when would you consider using it?

  10. How would you delete a JSON index?

Related: 50 Computer Programming Interview Questions (With Example Answers)

JSON interview questions with sample answers

When you prepare for you r interview, you may find that study guides or sample question and answer-based documents help you feel more confident in understanding the types of questions you may encounter. Practicing prior to an interview and reviewing key coding components for your platform or language of choice can help you provide clear, concise and understandable answers to your interviewer. Below is a list of sample questions and answers that you may encounter during your interview:

1. What other programming languages integrate with JSON?

This question is simple but may gauge how comfortable you are working in other platforms or languages. While you may not do this in your role, you may be tasked with building integrations or adopting a broader scope of understanding for a variety of platforms and languages. You may consider building your list with the most common languages that add value to the organization and continue to add to the list to show a variety of possible compatible languages.

Example: "There are several programming languages that are currently compatible with JSON. Before choosing an alternate language or platform, it's important to ensure that the needs of the organization are met before making a choice. Languages in this list include C#, C, C++, Java, JavaScript and several others."

Related: Top Programming Interview Questions and Answers

2. What is Newtonsoft as it pertains to JSON?

This type of question tests your familiarity with the JSON platform and is commonly found in these types of interviews to ensure that you understand the fundamentals prior to your potential hire. You can curate a response that answers the question without overcomplicating the topic. You may consider speaking in layman's terms for conciseness and understanding.

Example: "Newtonsoft is a .net framework that allows JSON to operationally function. It's considered a serializer that allows you to edit JSON commands directly in an internal framework. The syntax you use with Newtonsoft, otherwise known as JSON.net, is very simplistic and easy to understand for programmers of all skill levels."

3. What is the main disadvantage of using JSON?

This question may assure the interviewer that you have experience working on other platforms. It's easy to become comfortable using standard, favored processes, so you may prepare for this question by evaluating the pros and cons of JSON and other related programming languages that may work in the organization.

Example: "While there are many advantages to using JSON, every platform and language has its own unique set of advantages and disadvantages. JSON isn't the best to use for large-scale data products or for projects that require commenting or readability. With more than a few simple data sets, the output can become complex and difficult to understand, leading to an increased margin for error."

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